Okskall det g?rasr l?sning

d separata n?tverk samt stor geografisk spridning

lingsenhet som s?ger ?t mig att vara lugn r detta i ay.. Thanks.. 

 

Hampus Lind

Rikspolisstyrelsen

National Police Board

Tel dir: +46 (0)8 - 401 99 43

Tel mob: +46 (0)70 - 217 92 66

E-mail: hampus.lind at rps.police.se

 

 

-----Ursprungligt meddelande-----
Fr?n: Paul Keating [mailto:pkeating at bank-banque-canada.ca] 
Skickat: den 4 december 2006 20:12
Till: Hampus Lind; Justin Piszcz; WEAVER, Simon
Kopia: veritas-bu at mailman.eng.auburn.edu
?mne: RE: [Veritas-bu] LTO-3 and MPX

 

Not at all.....if the total amount of data provided to the drive is

above the "minimum streaming rate" of the drive, then the drive will run

at a constant speed, and the slower client will just have have fewer

blocks on the tape than the faster clients.

 

So your data interleaving on the tape, if client A and B are twice as

fast as client C, will look like:

 

A-B-A-B-C-A-B-A-B-C-A-B-A-B-C-A-B-A-B-C....

 

Well, sort of...it won't be as neat as that.

 

The idea of multiplexing is to provide data to the drive fast enough, ie

combining datastreams from multiple clients, so that it will not need to

stop/rewind.

 

 

 

Paul

 

-- 

 

 

> -----Original Message-----

> From: Hampus Lind [mailto:hampus.lind at rps.police.se] 

> Sent: November 26, 2006 3:06 AM

> To: 'Justin Piszcz'; 'WEAVER, Simon'

> Cc: veritas-bu at mailman.eng.auburn.edu; Paul Keating

> Subject: SV: [Veritas-bu] LTO-3 and MPX

> 

> 

> So what happens on the drive side if I have MPX set to 3 and 

> then start a

> backup of 2 clients that can push data fast and 1 client that 

> are really

> slow?

> 

> Is it the slow client that decide the speed of the drive then 

> and make it

> stop/rewind/paus etc. and the other clients have to wait for 

> the slower one?

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La version fran?aise suit le texte anglais.

 

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